Combination screw driver and starter



Se t. 27 1927.

p E. WALKER COMBINATION SCREW DRIVER AND STARTER Filed March 2. 1927 INVENTOR u/v M44 1. KER

ATTORNEYS.

Patented Sept. 27, 1927.

PATENT OFFICE.

EDMUND WALKER, OF WILLOWS, CALIFORNIA.

I COMBINATION SCREW DRIVER AND STARTER.

Application filed March], 1927. Serial No. 172,089.

The present invention relatesto improvements in a combination screw driver and starter and its particular object is to provide in combination with a screw driver a 6 starting element allowing a blow to be delivered to the shank of the screw driver for the'purpose of giving initial movement to a screw for starting the latter before turning movement is commenced. It is particularly proposed in this connection to utilize for this purpose a retractable cap for the shank of the screw driver 'having spring means associated therewith for setting the cap for the purpose of delivering a blow 1 when the cap is released from a retracted position.

Further objects and advantages of my invention will appear as the specification proceeds.

The preferred form of my invention is illustrated in the accompanying drawing, in which Figure 1 shows a longitudinal section through the screw driver; and

Figure 2 a transverse section taken along line 2-2 of Figure 1. v.

While I-have shown only the preferred form of my invention, it should be understood that various changes, or modifications may be made within the scope of the claims hereto attached without departing from the spirit of the invention.

My screw driver 1 comprises the conventional tip 2 adapted to be introduced into the slot of a screw, not shown in the drawing, for imparting turning motion to the same and a shank 3 of uniform cross section, preferably c lindrical in form. The shank 1s cored as s own at 3 and open at the upperjend.

' A cap 4 preferably including a sleeve 6 and a close 'end iece 7 threaded thereon as at 8 is made sli able on the shank and is held against revolvin motion by means of a key 9 riding in a eyway 11. It is understood of course that the shank and the cap might be madev of angular cross section attheir engaging faces for the same purpose. The end piece of the cap has a pin 12 as shown at 14, the spring being accommodated in the bore 3 of the shank and being fastened at the lower end of the bore by means of a transverse pin16.

In operating, the tip 2 of the screw driver is introduced into the slot of the screw to be driven, whereupon the point of the latter is held against the object into which it is to be driven. The operator now holding the lower end of the shank in the left hand while preferably guiding the screw with his fingers, retractsthe cap over the opposition of the spring 13 and thereupon releases the cap, which causes the spring to draw the cap to its seat for delivering a blow to the end of the shank whereby the screw is partly driven into the object into which it is to be screwed. The cap may then be turned for finishing the driving of the screw.

I claim:

1. A combination screw driver and starter comprising a screw driver, a capslidable thereon, and resilient means urging the cap to seat on the screw driver for delivering a blow thereto when the cap is released from a retracted position.

2. A combination screw driver and starter comprising a screw driver having a smooth shank of uniform diameter, a cap slidable on the shank and means urging the cap to seat on the shank for delivering a blow thereto when the cap is released from a retracted position. v

3. A combination screw driver and starter comprising a screw driver having a smooth shank of uniform diameter and a cylindrical bore, a cap slidable on theshank and a spring fastened in the bore, and attached to the cap and adapted to seat the ca for deliverin a blow to the shank when t 0 cap is released from a retracted position.

4. A combination as defined in claim 3 in EDMUND WALKER. 

